Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015		Oct. 31, 2014
Revenues:
Product sales (including $43.6 million, $100.5 million and $115.0 million of related party revenue)	$ 62,563	$ 128,595		$ 136,842
Service agreements and license revenues (including $8.5 million, $11.4 million and $14.9 million of related party revenue)	32,758	21,012		25,956
Advanced technologies contract revenues (including $0 million, $0.6 million and $0.4 million of related party revenue)	12,931	13,470		17,495
Total revenues	108,252	163,077		180,293
Costs of revenues:
Cost of product sales	63,474	118,530		126,866
Cost of service agreements and license revenues	33,256	18,301		23,037
Cost of advanced technologies contract revenues	11,879	13,470		16,664
Total costs of revenues	108,609	150,301		166,567
Gross (loss) profit	(357)	12,776		13,726
Operating expenses:
Administrative and selling expenses	25,150	24,226		22,797
Research and development expenses	20,846	17,442		18,240
Total operating expenses	45,996	41,668		41,037
Loss from operations	(46,353)	(28,892)		(27,311)
Interest expense	(4,958)	(2,960)		(3,561)
Other income (expense), net	622	2,442		(7,523)
Loss before provision for income taxes	(50,689)	(29,410)		(38,395)
Provision for income taxes	(519)	(274)		(488)
Net loss	(51,208)	(29,684)		(38,883)
Net loss attributable to noncontrolling interest	251	325		758
Net loss attributable to FuelCell Energy, Inc.	(50,957)	(29,359)		(38,125)
Preferred stock dividends	(3,200)	(3,200)		(3,200)
Net loss to common shareholders	$ (54,157)	$ (32,559)		$ (41,325)
Net loss to common shareholders per share
Basic	$ (1.82)	$ (1.33)		$ (2.02)
Diluted	$ (1.82)	$ (1.33)	[1]	$ (2.02)	[1]
Weighted average shares outstanding
Basic	29,773,700	24,513,731		20,473,915
Diluted	29,773,700	24,513,731		20,473,915

[1] Due to the net loss to common shareholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. At October 31, 2016 and 2015, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: October 31, 2016 October 31, 2015July 2016 Offering - Series A Warrants7,680,000 —July 2016 Offering - Series B Warrants3,826,000 —July 2014 Offering - NRG Warrants166,666 166,666Outstanding options to purchase common stock246,923 257,769Unvested RSAs915,831 450,7835% Series B Cumulative Convertible Preferred Stock (2)454,043 454,043Series 1 Preferred Shares to satisfy conversion requirements (2)1,042,000 337,200 Total potentially dilutive securities14,331,463 1,666,461(2)Refer to Note 12, Redeemable Preferred Stock, for information on the calculation of the common shares upon conversion.